GB663837A - Improvements in or relating to electron discharge apparatus - Google Patents
Improvements in or relating to electron discharge apparatusInfo
- Publication number
- GB663837A GB663837A GB32803/47A GB3280347A GB663837A GB 663837 A GB663837 A GB 663837A GB 32803/47 A GB32803/47 A GB 32803/47A GB 3280347 A GB3280347 A GB 3280347A GB 663837 A GB663837 A GB 663837A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- feed
- sweep
- grid
- coding element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
- H01J31/04—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with only one or two output electrodes with only two electrically independant groups or electrodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/044—Sample and hold circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Measurement Of Radiation (AREA)
- Particle Accelerators (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Details Of Television Scanning (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
663,837. Cathode-ray tubes. WESTERN ELECTRIC CO., Inc. Dec. 12, 1947 [Dec. 13, 1946], No. 32803/47. Addition to 637,820. Class 39 (i). [Also in Groups XXXV and XL (c)] In a signalling system as claimed in the parent Specification in which the amplitude of a complex wave is sampled at recurrent intervals, an electron beam of a cathode-ray tube is deflected in one direction by plates 33, Fig. 1, to an extent in accordance with the amplitude of each sample to select a path and is swept along that path by sweep circuit 34, and a coding element 26 comprising a plate with rows of apertures formed therein produces pulses at the target 25 representing by a permutation code the sampled signal wave amplitude, a grid electrode 28 is arranged in front of the coding element 26 and is connected by a feed-back path comprising amplifier 44 to the deflecting plates 33 so that as a result of current flowing to grid electrode 28 a feed-back voltage is applied to plates 33 to hold the beam in the selected path. The coding element 26 may have five parallel rows I ... V of apertures 27 therein, as shown in Fig. 2, and the grid 28 comprises a number of parallel wires aligned with the apertures in the coding element and secured to a frame 28. Members 26, 28 are secured together by insulating studs 32. The signal sample is applied to plates 33 via condenser 42 and leaks slowly away through resistor 43 so that the beam, deflected initially to a point between two grid wires 31, moves to contact a wire 31 so that the feed-back to plates 33 is varied and consequently the beam is held against the grid wire for the duration of the sweep. The beam is thus held in its correct path during a sweep despite slight variations in the input signal or misalignment of the grid wires with the direction of the beam sweep or disturbances in the beam sweep system. To avoid coding errors, the beam may be blanked and the feed-back circuit closed or the feed-back circuit opened and the beam left on until the plates 33 are energized. In a modification (not shown) a seven-digit coding element may be used. Specifications 630,094, [Group XL (c)], and 633,838 are referred to.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US637820XA | 1946-03-22 | 1946-03-22 | |
| US715900A US2458652A (en) | 1946-12-13 | 1946-12-13 | Electron discharge apparatus |
| US663872XA | 1947-11-13 | 1947-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB663837A true GB663837A (en) | 1951-12-27 |
Family
ID=27370526
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22025/47A Expired GB637820A (en) | 1946-03-22 | 1947-08-08 | Pulse code signalling systems |
| GB32803/47A Expired GB663837A (en) | 1946-03-22 | 1947-12-12 | Improvements in or relating to electron discharge apparatus |
| GB32804/47A Expired GB663838A (en) | 1946-03-22 | 1947-12-12 | Improvements in or relating to electron discharge apparatus |
| GB29092/48A Expired GB663872A (en) | 1946-03-22 | 1948-11-09 | Improvements in or relating to electric pulse signalling systems |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22025/47A Expired GB637820A (en) | 1946-03-22 | 1947-08-08 | Pulse code signalling systems |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32804/47A Expired GB663838A (en) | 1946-03-22 | 1947-12-12 | Improvements in or relating to electron discharge apparatus |
| GB29092/48A Expired GB663872A (en) | 1946-03-22 | 1948-11-09 | Improvements in or relating to electric pulse signalling systems |
Country Status (5)
| Country | Link |
|---|---|
| BE (4) | BE485738A (en) |
| DE (2) | DE809222C (en) |
| FR (4) | FR953466A (en) |
| GB (4) | GB637820A (en) |
| NL (2) | NL79798C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE958204C (en) * | 1952-08-22 | 1957-02-14 | Siemens Ag | Device for converting amplitude-modulated pulses into code-modulated pulses |
-
0
- BE BE476835D patent/BE476835A/xx unknown
- FR FR957139D patent/FR957139A/fr not_active Expired
- BE BE477959D patent/BE477959A/xx unknown
- BE BE477109D patent/BE477109A/xx unknown
- NL NL74850D patent/NL74850C/xx active
- NL NL79798D patent/NL79798C/xx active
- BE BE485738D patent/BE485738A/xx unknown
- FR FR957199D patent/FR957199A/fr not_active Expired
-
1947
- 1947-08-08 GB GB22025/47A patent/GB637820A/en not_active Expired
- 1947-09-24 FR FR953466D patent/FR953466A/en not_active Expired
- 1947-12-12 GB GB32803/47A patent/GB663837A/en not_active Expired
- 1947-12-12 GB GB32804/47A patent/GB663838A/en not_active Expired
-
1948
- 1948-09-07 FR FR59521D patent/FR59521E/en not_active Expired
- 1948-11-09 GB GB29092/48A patent/GB663872A/en not_active Expired
- 1948-12-31 DE DEP28896D patent/DE809222C/en not_active Expired
- 1948-12-31 DE DEP28885D patent/DE838324C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL79798C (en) | |
| FR953466A (en) | 1949-12-07 |
| BE477109A (en) | |
| GB663838A (en) | 1951-12-27 |
| BE477959A (en) | |
| BE476835A (en) | |
| DE838324C (en) | 1952-05-08 |
| BE485738A (en) | |
| FR59521E (en) | 1954-06-28 |
| GB637820A (en) | 1950-05-24 |
| DE809222C (en) | 1951-07-26 |
| FR957139A (en) | 1950-02-16 |
| NL74850C (en) | |
| GB663872A (en) | 1951-12-27 |
| FR957199A (en) | 1950-02-16 |
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